CN114329100A - Regional electric quantity management system based on loop current monitoring - Google Patents

Regional electric quantity management system based on loop current monitoring Download PDF

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Publication number
CN114329100A
CN114329100A CN202111510331.6A CN202111510331A CN114329100A CN 114329100 A CN114329100 A CN 114329100A CN 202111510331 A CN202111510331 A CN 202111510331A CN 114329100 A CN114329100 A CN 114329100A
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data
module
analysis
line
management system
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孙延庆
宋国龙
孙婷
李哲
马力
张立君
李海禄
鲁城
杨罡
冯焱
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Daqing High Tech Zone Zhonghuan Power Control System Co ltd
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Daqing High Tech Zone Zhonghuan Power Control System Co ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S10/00—Systems supporting electrical power generation, transmission or distribution
    • Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
    • Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
    • Y04S40/126—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wireless data transmission

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Abstract

The invention discloses a regional electric quantity management system based on loop current monitoring, and particularly relates to the technical field of electric quantity management. The invention realizes 24-hour uninterrupted high-density monitoring of the three-phase current data of the line, intelligent analysis of the load condition of the line, intelligent screening of abnormal power consumption conditions, automatic networking remote online intelligent monitoring and finally regional power management intellectualization and scientization through the cooperation of the wireless current sensor, the data acquisition module and the background host module.

Description

Regional electric quantity management system based on loop current monitoring
Technical Field
The invention relates to the technical field of electric quantity management, in particular to a regional electric quantity management system based on loop current monitoring.
Background
The increase of supply, the increase of loss and the increase of efficiency are always the key points of electric power work, and the real-time, accurate and complete basic data of electric power operation and the stable operation of field acquisition equipment all put forward higher requirements on the related technology of the power consumption information monitoring system. In order to meet the requirement of building an intelligent power grid in China, on-line monitoring of power system equipment and circuits is one of important measures for realizing loss reduction and cost increase. Meanwhile, the continuous improvement of the reliability index of the electronic component also provides possibility for the application of an online monitoring method and measures.
How to ensure that the operation of a power grid is more stable, safer and more scientific is a problem to be solved urgently by technical personnel in the field.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a regional power management system based on loop current monitoring.
The regional electric quantity management system based on loop current monitoring comprises a wireless current sensor, a data acquisition module and a background host module which are sequentially connected;
the wireless current sensor is used for acquiring three-phase current data and sending the acquired three-phase current data to the data acquisition module in a wireless transmission mode;
the data acquisition module is used for preprocessing the three-phase current data and sending the preprocessed effective three-phase current data to the background host module;
the background host module is used for receiving the effective three-phase current data, calling an algorithm to calculate line loss and line loss rate, performing comparative analysis according to a calculation result, and performing data display and early warning according to a comparative analysis result.
Preferably, the wireless current sensor comprises a current sensor module, an RF433 communication module, a wireless transceiver module, an embedded main control chip, an LED lamp and a lithium battery, wherein a frequency band, a communication distance, a receiving power consumption and a transmitting power consumption of the RF433 communication module are configured according to a first preset parameter table.
Preferably, three wireless current sensors are placed at specified measurement points when three-phase current data is acquired.
Preferably, the data acquisition device comprises an RF433 communication module, a GPS communication module, a wireless public network communication module, a sucker antenna, a solar panel, and a backup power source, wherein a communication mode and a communication protocol of the data acquisition device are configured according to a second preset parameter table.
Preferably, the background host module includes: a gateway receiving unit: the system comprises a data acquisition module, a data storage module and a data processing module, wherein the data storage module is used for storing effective three-phase current data; the algorithm analysis unit is used for calling a preset algorithm to calculate the line loss and the line loss rate and analyzing and early warning according to the line loss and the line loss rate; a data storage unit: the system is used for storing effective three-phase circuit data, line loss rate and comparison analysis results; a service display unit: and the method is used for visually displaying the change analysis result, the comparison analysis result and the comprehensive analysis result.
Preferably, the algorithm analyzing unit includes: a pre-operation unit: the system comprises a data processing module, a data processing module and a data processing module, wherein the data processing module is used for carrying out pre-operation according to effective three-phase current data to obtain pre-processing data, and the pre-processing data comprises rated capacity of a public distribution transformer and monthly electric energy loss of a whole line; root mean square current values of the sections of the line; resistance values of all sections of the circuit and circuit running time; a comprehensive analysis unit: the system is used for analyzing and early warning according to the preprocessed data, wherein the analysis comprises line loss analysis, line loss rate analysis, load analysis and abnormal power utilization analysis, and the early warning comprises current overrun warning, abnormal power utilization warning, power factor threshold warning and cable temperature threshold warning.
Preferably, the analysis operation unit includes: line loss arithmetic unit: the system comprises a single line state tree model, a bus loss rate calculation module, a bus state tree model calculation module and a bus loss rate calculation module, wherein the single line state tree model is used for calculating the bus loss and the bus loss rate according to the single line state tree model; the method comprises the steps of constructing an undirected graph according to a local power distribution network graph, and constructing a single-line state tree model by taking a power supply as a root node according to the running state of the local power distribution network.
The invention has the beneficial effects that:
1) based on the cooperation of the wireless current sensor, the data acquisition module and the background host module, automatic networking is realized, professional analysis can be performed based on complete data, the line load condition is monitored in real time, the line load condition is mastered, abnormal load lines are found, and reference is provided for line optimized operation, so that potential safety hazards are reduced, the working intensity of personnel is reduced, the fault response time is prolonged, and safe and stable production is guaranteed.
2) The intelligent analysis of the load carried by each power supply and the power supply of each load is realized by utilizing the network topology relation automatically generated by the system, so that people can clearly know the carried load. The line work of electric power personnel is clearer, the dispatching command is safer and quicker, and the operation of the power grid is more efficient and stable.
3) According to the data monitored in real time and the load condition, the abnormal power utilization condition can be early warned based on the analysis of the big data, and the staff is assisted to analyze and detect the abnormal power utilization.
Drawings
In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
FIG. 1 is a block diagram of the system of the present invention;
FIG. 2 is a schematic diagram of the operation of the system of the present invention;
FIG. 3 is a schematic structural diagram of a background host module;
fig. 4 is a schematic diagram of the operation of the line loss calculating unit.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the invention pertains.
Referring to fig. 1-2, the loop current monitoring based regional power management system includes a wireless current sensor, a data acquisition module and a background host module, which are connected in sequence;
the wireless current sensor is used for acquiring three-phase current data and sending the acquired three-phase current data to the data acquisition module in a wireless transmission mode;
the data acquisition module is used for preprocessing the three-phase current data and sending the preprocessed effective three-phase current data to the background host module;
the background host module is used for receiving the effective three-phase current data, calling an algorithm to calculate line loss and line loss rate, performing comparative analysis according to a calculation result, and performing data display and early warning according to a comparative analysis result.
It should be noted that the wireless current sensor includes a current sensor module, an RF433 communication module, a wireless transceiver module, an embedded main control chip, an LED lamp, and a lithium battery, where table 1 is a second preset parameter table, and configures a frequency band, a communication distance, a receiving power consumption, and a transmitting power consumption of the RF433 communication module according to a first preset parameter table; table 2 is a data accuracy requirement table of the wireless current sensor; when three-phase current data is acquired, three wireless current sensors are placed at specified measurement points.
TABLE 1
Figure BDA0003405019890000041
TABLE 2
Figure BDA0003405019890000042
It should be noted that the data acquisition device includes an RF433 communication module, a GPS communication module, a wireless public network communication module, a sucker antenna, a solar panel, and a backup power source, where table 3 is a second preset parameter table, and configures a communication mode and a communication protocol of the data acquisition device according to the second preset parameter table.
TABLE 3
Figure BDA0003405019890000043
Figure BDA0003405019890000051
Referring to fig. 3, it should be noted that the background host module includes: a gateway receiving unit: the system comprises a data acquisition module, a data storage module and a data processing module, wherein the data storage module is used for storing effective three-phase current data; the algorithm analysis unit is used for calling a preset algorithm to calculate the line loss and the line loss rate and analyzing and early warning according to the line loss and the line loss rate; a data storage unit: the system is used for storing effective three-phase circuit data, line loss rate and comparison analysis results; a service display unit: the algorithm analysis unit is used for visually displaying change analysis results, comparison analysis results and comprehensive analysis results, and comprises: a pre-operation unit: the system comprises a data processing module, a data processing module and a data processing module, wherein the data processing module is used for carrying out pre-operation according to effective three-phase current data to obtain pre-processing data, and the pre-processing data comprises rated capacity of a public distribution transformer and monthly electric energy loss of a whole line; root mean square current values of the sections of the line; resistance values of all sections of the circuit and circuit running time; a comprehensive analysis unit: the system is used for analyzing and early warning according to the preprocessed data, wherein the analysis comprises line loss analysis, line loss rate analysis, load analysis and abnormal power utilization analysis, and the early warning comprises current overrun warning, abnormal power utilization warning, power factor threshold warning and cable temperature threshold warning.
In addition, the analysis operation unit includes: line loss arithmetic unit: the system comprises a single line state tree model, a bus loss rate calculation module, a bus state tree model calculation module and a bus loss rate calculation module, wherein the single line state tree model is used for calculating the bus loss and the bus loss rate according to the single line state tree model;
specifically, the calculation process of the bus loss and the bus loss rate is as follows:
referring to fig. 4, a single-line undirected connection diagram is constructed according to the connectivity of the local power grid, and a state number model is constructed according to the operating state of the power grid and with the power supply as a root node. During calculation, the line loss of the branches is calculated first, and then the line loss of the branches is accumulated according to the state number model to finally obtain the total line loss and the line loss rate.
(1) Root mean square current value of each section of line
Figure BDA0003405019890000061
In the formula: i istThe load current through the element at each hour, a.
(2) Calculating the monthly electric energy loss of the whole line according to a point-by-point sectional calculation and re-accumulation method
Figure BDA0003405019890000062
In the formula: Δ A-monthly power loss for the full line; i isrms.i-rms current values of the segments of the line; ri-resistance values of the sections of the line; t-line run time.
(3) Obtaining a line loss rate of
Figure BDA0003405019890000063
The main functions of the invention include:
data acquisition: collecting electric parameters, collecting the electric parameters in a current mutual inductance mode, sorting and analyzing data, and transmitting the electric parameters to a data collection device in a wireless mode; collecting and collecting three-phase electric parameters, analyzing the electric parameters by protocols, and analyzing and storing effective data; arranging and forwarding, wherein the data acquisition device is connected with the system background, is matched with the unique data identifier and forwards the stored effective data to the system background; receiving and storing data, receiving (supporting multiple devices) the acquired data by the gateway, generating real-time data, performing algorithm processing and analysis, generating an analysis result, storing the analysis result in a database,
Algorithm service: pre-operation, rated capacity of public distribution transformer, monthly electric energy loss of whole line; root mean square current values of the sections of the line; resistance values of all sections of the circuit and circuit running time; analysis, early warning, line loss analysis, line loss rate analysis, load analysis, abnormal power consumption analysis, current overrun alarm, abnormal power consumption alarm, power factor threshold alarm and cable temperature threshold alarm.
And (3) service display: analyzing the change, namely analyzing the current, line loss and load change; carrying out comparative analysis, namely carrying out comparative analysis on line losses of the same type, the same time and the same region, carrying out current comparative analysis and carrying out load comparative analysis; comprehensive analysis, historical data query and overall condition analysis.
In conclusion, the invention adds the wireless current sensor and the acquisition device which are monitored in real time to the loop circuit, realizes uninterrupted high-density monitoring of the three-phase current data of the circuit within 24 hours, analyzes the load condition of the circuit through the background host module, intelligently screens the abnormal power utilization condition, realizes remote online intelligent monitoring of automatic networking, and finally realizes intellectualization and scientization of regional power management.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.

Claims (7)

1. The regional electric quantity management system based on loop current monitoring is characterized by comprising a wireless current sensor, a data acquisition module and a background host module which are sequentially connected;
the wireless current sensor is used for acquiring three-phase current data and sending the acquired three-phase current data to the data acquisition module in a wireless transmission mode;
the data acquisition module is used for preprocessing the three-phase current data and sending the preprocessed effective three-phase current data to the background host module;
the background host module is used for receiving the effective three-phase current data, calling an algorithm to calculate line loss and line loss rate, performing comparative analysis according to a calculation result, and performing data display and early warning according to a comparative analysis result.
2. The loop current monitoring-based regional power management system of claim 1, wherein the wireless current sensor comprises a current sensor module, an RF433 communication module, a wireless transceiver module, an embedded main control chip, and an LED lamp and a lithium battery, wherein a frequency band, a communication distance, a receiving power consumption and a transmitting power consumption of the RF433 communication module are configured according to a first preset parameter table.
3. The loop current monitoring based regional power management system of claim 2, wherein three wireless current sensors are placed at specified measurement points when three-phase current data is acquired.
4. The loop current monitoring based regional power management system of claim 1, wherein the data acquisition device comprises an RF433 communication module, a GPS communication module, a wireless public network communication module, a sucker antenna, a solar panel, and a backup power source, wherein a communication mode and a communication protocol of the data acquisition device are configured according to a second preset parameter table.
5. The loop current monitoring-based regional power management system of claim 1, wherein the background host module comprises:
a gateway receiving unit: the system comprises a data acquisition module, a data storage module and a data processing module, wherein the data storage module is used for storing effective three-phase current data;
the algorithm analysis unit is used for calling a preset algorithm to calculate the line loss and the line loss rate and analyzing and early warning according to the line loss and the line loss rate;
a data storage unit: the system is used for storing effective three-phase circuit data, line loss rate and comparison analysis results;
a service display unit: and the method is used for visually displaying the change analysis result, the comparison analysis result and the comprehensive analysis result.
6. The loop current monitoring based regional power management system of claim 4, wherein the algorithmic analysis unit comprises:
a pre-operation unit: the system comprises a data processing module, a data processing module and a data processing module, wherein the data processing module is used for carrying out pre-operation according to effective three-phase current data to obtain pre-processing data, and the pre-processing data comprises rated capacity of a public distribution transformer and monthly electric energy loss of a whole line; root mean square current values of the sections of the line; resistance values of all sections of the circuit and circuit running time;
a comprehensive analysis unit: the system is used for analyzing and early warning according to the preprocessed data, wherein the analysis comprises line loss analysis, line loss rate analysis, load analysis and abnormal power utilization analysis, and the early warning comprises current overrun warning, abnormal power utilization warning, power factor threshold warning and cable temperature threshold warning.
7. The loop current monitoring-based regional power management system of claim 4, wherein the analysis and calculation unit comprises:
line loss arithmetic unit: the system comprises a single line state tree model, a bus loss rate calculation module, a bus state tree model calculation module and a bus loss rate calculation module, wherein the single line state tree model is used for calculating the bus loss and the bus loss rate according to the single line state tree model; the method comprises the steps of constructing an undirected graph according to a local power distribution network graph, and constructing a single-line state tree model by taking a power supply as a root node according to the running state of the local power distribution network.
CN202111510331.6A 2021-12-10 2021-12-10 Regional electric quantity management system based on loop current monitoring Pending CN114329100A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115203274A (en) * 2022-07-25 2022-10-18 云南电网有限责任公司楚雄供电局 Big data screening system for distribution transformer capacity abnormity

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115203274A (en) * 2022-07-25 2022-10-18 云南电网有限责任公司楚雄供电局 Big data screening system for distribution transformer capacity abnormity
CN115203274B (en) * 2022-07-25 2023-12-26 云南电网有限责任公司楚雄供电局 Big data screening system for abnormal capacity of distribution transformer

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